________，he talks a lot about his favorite singers after class.

A．A quiet student as he may be

B．Quiet student as he may be

C．Be a quiet student as he may

D．Quiet as he may be a student

A man cannot smile like a child，________ a child smiles with his eyes，while a man smiles with his lips alone.

A．so B．but C．and D．for

Many of them turned a deaf ear to his advice，________ they knew it to be valuable.

A．as if B．now that

C．even though D．so that

—Where's that report?

—I brought it to you ________ you were in Mr.Black's office yesterday.

A．if B．when C．because D．before

The village has developed a lot ________ we learned farming two years ago.

A．when B．which C．that D．where

________ he has limited technical knowledge, the old worker has a lot of experience.

A．Since B．Unless C．As D．Although

________ I really don't like art, I find his work impressive.

A．As B．Since C．If D．While

________ hard one may work, one cannot master a foreign language in a month or two.

A．Whenever B．Wherever

C．Whatever D．However

People who are really in need of houses will suffer heavy losses ________ the government takes measures to bring down house prices.

A．if B．in case C．unless D．since

You will be successful in the interview ________ you have confidence.

A．before B．once C．until D．though